Elastic-fiitjid-tttrbine-driven set



J. H. DURAN.

ELASTIC FLUID TURBINE DRIVEN SET.

' APPLICATION FILED IMY 1?. I920.

1,362,401. Patented Dec. 14, 1920.

Fig.3. Fig.2.

Double (7000! Txvhqve il as 6 l5 I2 7 I2 I nventor-z l3 John H Doran,

H i sALLornes.

sprin t eir JOHN H. DORAN,

OF SCHENECTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC} COMPANY, A CORPORATION OF NEW YORK.

ELASTIC-FLUID-TURBINE-DRIVEN SET.

Specification of Letters Patent.

Patented Dec. 14, 1920.

Application filed May 17, 1920. Serial No. 351,920.

T 0 all whom it may concern:

Be it known that I, JOHN H. DonAN, a citizen of the United States, residing at Schenectady, in the county of Schenectady. State of New York, have invented new and useful Improvements in Elastic-Fluid-Tun bine-Driven Sets, of which the following is a specification.

The present invention relates to elastic fluid turbine driven sets, and more particu larly to sets comprising a turbine of the radial flow type wherein. the rotor comprises two oppositely rotating members, located in a casing which is rigidly supported, said members driving separate machines which are located on opposite sides of the turbine casing and have their casings spring supported and directly connected to the turbine casing.

The object of my invention is to provide an improved structure and arrangement in a set of this character, tion of what I believe to be novel and my invention, attention is directed to the accompanying description and the claims appended thereto.

In the drawing, Figure 1 is an outline of a turbine driven set.embod ing my invention; Fig. 2 is a view on a arger scale and partly in section of a part ofthe set shown in Fig. l; and Fig. 3 is a view similar to Fig. 2, of a modification.

Referring to the drawing, 5 indicates the casing of an elastic fluid turbine of the radial flow type having a wall 6 which defines an exhaust opening. The turbine casing is rigidly supported, such support being shown as comprising a condenser 7 having an inlet COIldU-lt 8 on which wall 6 rests an to which it is bolted. The turbine is thus rigidly supported on the condenser, and the latter in turn is mounted on a foundation which ma be of concrete. The turbine is of the radial flow type and has oppositely rotating rotors which are coupled directly to driven machines 9 and 10 shown as being electric generators. Generators 9 and 10 are supported on columns 11 which at ower ends rest on spring 12 carried on brackets 13 projecting from opposite sides of the condenser casing. 14 indicates an oil tank carried by the one generator casing, and 15 indic es conduits for cooling air for the cue tors. Formed integra with the tur inc casing on opposite sides and for a considerathereof are bolting flanges 16, and the generator casings are bolted directly to such flanges through the intermediary of rin 17 'which have flanges 18 at their two enzfi l.) indicates the bolts which connect flanges 18 to the bolting flanges 16 on the turbine casing and flanges 20 on the generator cas mgs.

During the operation of an elastic fluid turbine the casing is subjected to wide varia tions in temperature while starting up and with changes in load which cause sudden expansions and contractions of the casing. 011 the other hand, the generator casing re mains at a substantially constant temperature due principally to the system of cooling therefor. The turbine casing must therefore be able to expand and contract without setting up too great stresses at the )oints of connection to the generator. Also in a set in which the generator or generators are spring supported vibrations may be set up by the generator or enerators and it is necessary that the turbine casing be protected against such vibrations. and generator casings are made of cast iron and according to my invention whenever I utilize se arate rings 17 for connecting them I am ena led to make such rings of cast steel which gives ample strength to the connection between the turbine and generator casings, and avoids the necessity of making the entire turbine casing of cast steel as would otherwise be the case and which would very largely increase the cost.

In order to reduce the stresses in the rings 1? caused by uneven heating and the slow transfer of heat from the turbine through rings 17 to the generator, I provide slots 21 which extend from points in flanges 16 part way through rings 17. These serve to prevent the tangential stresses due to expansion from becomin too great.

In Fig. 3 have shown an arrangement similar to that shown in Fig. 2 except that rings 17, which correspond to rings 17 of Fig. 2, are provided with internal flanges 18' which are bolted directly to the turbine casing by bolts 19" which are preferably tapered to prevent leakage, and with internal flan 18 which are bolted to flange 20 on 5?: generator casin Also ring 17 has spaced openings 22 an slots 21 which correspond to the slots 21 of Fi 1.

In accordance wit the provisions of the The turbine.

patent statutes, I have described the principle of operation of my invention together with the apparatus which I now consider to represent the bestembodiment thereof, but I desire to have it understood that the a paratus shown is only illustrative and t at the invention may be carried out by other means.

What I claim as new and desire to secure by Letters Patent of the United States, is: 1. In combination, a rigidly su iported turbine casing, a yieldably supporte casing, and a separate ring which is fastened to and connects said casings together whereby said ring may be made of a material stronger than that of which the casings are made.

2. In combination, a condenser, a turbine rigidly mounted thereon, a driven machine having its casing yiel'clably supported on the condenser casing, and a separate ring which is fastened to and connects said turbine and driven casings to cther.

3. In combination, a tur ine which is rigidly supported, a driven machine on each side of the turbine, the casings of said driven machines being yieldably supported, and

separate rings which are fastened to and connect said driven machine casings to the turbine casing.

4. In combination, a rigidly supported turbine casing, a yieldably supported casing, and a separate ring which is fastened to and connects said casings together, Wl'18I'8- by said ring may be made of a material stronger than that of which the casings are made, said ring being provided with-spaced slots which extend from the one edge of the ring. art way across it.

5. n combination, a condenser, a turbine having oppositely rotating rotors, said turbine being mounted directly on the condenser: with its exhaust opening fastened to the inlet opening of the condenser, driven machines located on opposite sides of said turbine and yieldingly supported on said condenser, and separate rings having their ends fastened to the turbine casing and to the casings of said driven machines.

In witness whereof I have hereunto set my hand this 15th day of May 1920.

JOHN H. DORAN. 

